docs: update audiences.md

documentation/audiences.md

@@ -1,9 +1,9 @@
 With audiences you can serve different versions of your content to different groups of users based on the information you can glean from there current session. For instance, you can optimize the experience for:
 - mobile vs. desktop
 - Chrome vs. Firefox
-- 1st vs. returning visitor
-- fast vs slow connections
-- different ge0graphies
+- [1st vs. returning visitor](https://github.com/hlxsites/wknd/blob/main/scripts/scripts.js#L33-L34)
+- [fast vs slow connections](https://developer.mozilla.org/en-US/docs/Web/API/NetworkInformation/effectiveType)
+- different geographies via [Geolocation API](https://github.com/hlxsites/wknd/blob/main/scripts/scripts.js#L33-L34) or CDN workers ([Fastly]8https://www.fastly.com/documentation/reference/vcl/variables/geolocation/), [Cloudflare](https://developers.cloudflare.com/workers/examples/geolocation-hello-world/))
 - etc.
 
 ## Set up